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Master Brake Cylinder Repair Kit
Fits 41-66 Jeep & Willys

Part # 805654

New Master Brake Cylinder Repair Kit

Comes complete with all the major wear items on your frame mounted master cylinder for early Willys.

41-45 MB
41-45 GPW
46-49 CJ-2A
49-53 CJ-3A
53-64 CJ-3B
55-66 CJ-5
50-52 M38
52-66 M38A1
46-64 Truck
46-64 Station Wagon
48-51 Jeepster

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what is the bore size for the master cylinder kit #805654?

Willys Jeep Parts Tech:
1" cup like original.

Does this kit include a master cylinder cap?

Willys Jeep Parts Tech:
No they do not. Just the internal pieces shown in the photo.

Do you offer replacement caps for the master cylinder? My cap has been replaced with a plastic cap and I’m looking to go back to metal.

Willys Jeep Parts Tech:
7411069 if looking for a military cap with vent.

Does this repair kit 805654 fits Master brake cilinder Item # 945556 ?

Willys Jeep Parts Tech:
No, this is for the 805223 only.
Willys Jeep Parts Tech:
These kits are for the 4-cylinder, single reservoir master cylinders only. No one is making the repair kits for the dual reservoir master cylinders at this time. Thanks

What point is a master cylinder not rebuildable? What should I be looking for?

Willys Jeep Parts Tech:
If the bore of the master cylinder is not smooth and has notching or discoloration, I would not try to rebuild. It has to be able to seal the Dot 3 fluid properly.

Does this kit have 1" cup

Willys Jeep Parts Tech:
1" is correct.

Hello I have a 1948 pickup, and it has an aluminum master cyl(Says 'Wagner' on it) Is this the right kit to rebuild my MC? Thanks-

Willys Jeep Parts Tech:
If your master cylinder is aluminum its not original. Someone has replaced it with something. I would go with 805223 and replace whole thing then.

rebuilding a 1951 cj3a. does this master cyl. come with a brake light switch?

Willys Jeep Parts Tech:
647801 is the part number for the brake light switch. You'll also need the outlet bolt, fitting and crush washers too if your not reusing your old ones. We have those as well.

I ordered a master cylinder repair kit and all the parts are there and look the same as what I removed from my master cylinder. Except it is a smaller diameter. This is for a cj3a. What might be the issue? I have a Wagner Lockheed m/c

Willys Jeep Parts Tech:
Sounds like you may have an unoriginal master cylinder on there. Please call us toll free and we can try to help. You may just want to get part number: 805223

My 1949 CJ-2A has a Wagner Lockheed FE-3111 master cylinder which evidently was on early 1951 M38 Jeeps. Does the master cylinder kit you offer fit this maser cylinder? Thank you!

Willys Jeep Parts Tech:
The later CJ-2a and the M38 used the same master cylinder so this kit will fit the original.

Does this repair kit include the push rod seal (gasket). My push rod gasket or seal going into my master cylinder is not holding pressure.

Willys Jeep Parts Tech:
Yes, this will be a complete kit to seal your master cylinder.

While using the repair kit, I noticed my original set up did not include the tapered rubber washer. Would this washer go in between the metal washer and the piston assembly? Snap ring - metal washer - rubber washer - piston assembly? Thanks.

Willys Tech: This link will help.

I have a 67 cj 5 and I do not see a master cylinder or a rebuild kit for my jeep on your webpage

Willys Tech:
You could have either part number: 805223 or 945556 depending on your vehicle.

Will this fit a 67 jeepster / V6 /10brakes

Willys Tech:
You will want to order part number: 945556 for that vehicle.
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